A Guide to Naturalization and M-599, Naturalization Information for Military Personnel. USCIS manuals with information on the process and eligibility requirements to become a U.S. citizen. Available in PDF format.

A list of sample U.S. history and government questions for naturalization test preparation. The document is available in English, Spanish, Chinese, Tagalog, and Vietnamese. Available in PDF format and MP3 audio.

From the Smithsonian Institution, uses museum collections and exhibitions in a web-based learning tool that supports aspiring citizens’ efforts to prepare for the civics portion of the naturalization test.